中国电机工程学报
中國電機工程學報
중국전궤공정학보
ZHONGGUO DIANJI GONGCHENG XUEBAO
2012年
12期
22-27
,共6页
三电平%并网逆变器%无差拍电流控制%电感辨识%双调制波
三電平%併網逆變器%無差拍電流控製%電感辨識%雙調製波
삼전평%병망역변기%무차박전류공제%전감변식%쌍조제파
three-level%grid-connected inverter%deadbeat current control%inductor identification%dual references
传统无差拍电流控制策略的控制性能受滤波电感值变化的影响较大。在单相三电平并网逆变器中,首先引入易于DSP实现的双调制波三电平正弦脉宽调制（sine pulse widthmodulation,SPWM）方法,进而推导基于该方法的并网逆变器暂态数学模型。以此为基础,提出采用两次电流采样的在线电感辨识方法,结合数字低通滤波技术获得了实时电感辨识结果,并用于无差拍电流控制算法中,从而有效提高了并网电流控制性能。相应的实验结果证明了所提出方法的正确性和可行性。
傳統無差拍電流控製策略的控製性能受濾波電感值變化的影響較大。在單相三電平併網逆變器中,首先引入易于DSP實現的雙調製波三電平正絃脈寬調製（sine pulse widthmodulation,SPWM）方法,進而推導基于該方法的併網逆變器暫態數學模型。以此為基礎,提齣採用兩次電流採樣的在線電感辨識方法,結閤數字低通濾波技術穫得瞭實時電感辨識結果,併用于無差拍電流控製算法中,從而有效提高瞭併網電流控製性能。相應的實驗結果證明瞭所提齣方法的正確性和可行性。
전통무차박전류공제책략적공제성능수려파전감치변화적영향교대。재단상삼전평병망역변기중,수선인입역우DSP실현적쌍조제파삼전평정현맥관조제（sine pulse widthmodulation,SPWM）방법,진이추도기우해방법적병망역변기잠태수학모형。이차위기출,제출채용량차전류채양적재선전감변식방법,결합수자저통려파기술획득료실시전감변식결과,병용우무차박전류공제산법중,종이유효제고료병망전류공제성능。상응적실험결과증명료소제출방법적정학성화가행성。
The control performance of traditional deadbeat current control is easily affected by the variation of filtering inductor.In single-phase three-level grid-connected inverter,a dual reference waves three-level sine pulse width modulation（SPWM） method that suitable for implementation by DSP was introduced firstly,and then the dynamic mathematical model of the grid-connected inverter based on the aforementioned pulse width modulation（PWM） method was derived.On the basis,an online inductor identification method adopting two current samples was proposed.Combining with digital low-pass filter,real time inductor identification result was obtained.This result was applied into deadbeat current control algorithm,thus the grid-connected current control performance is increase efficiently.Corresponding experimental results verified the accuracy and feasibility of the proposed method.
